Dust-catcher.



V. E. EDWARDS.

DUST GATGHER.

APPLIOATIONTILED APR.8,1904.

968,456., Patented Aug. 23, 1910.

Poly DfvefrnQ/n.

1-To all 'whom 'it may concern:

-citizen .-of the United States, residing at Worcester, in the county `of Worcester andf` UNITED STATES -l vICTon E. EDWARDS, por WORCESTER, mssA'CHsETTs, Lessienon "To imponenti@ Cong sTnUCTIoN COMPANY,A or WORCESTER;lirassacHUsaTTs;-4 a- ComonnTIoiror MASSACHUSETTS.,

DUST-CATCHER.

Application tiled Aprilv, 1904. Serial No. 202,204.

Be it known that I, VICTOR E. EDwARDs,a

Commonwealth of Massachusetts, have invented a new and useful Improvement in a Dust- Catcher, of which the following is a' specification accompanied by drawings forming a part ofthe same, in which- Figure 1 is a plan viewv of a dust catcher embodying my invention. Fig. 2 is a central vertical sectional view. Fig 3 is a sectional view of a portion of the annular water 'distributing pipe, and Fig. 4 is a det-ached view of the device for regulating the water valve shown in sectional view to disclose the flexible diaphragm contained therein.

Similar reference letters and figures refer to similarl parts in the different views.

My invention relates to an apparatus designed to be comprised within an escape flue carrying dust in suspension, such for example as fthe flue of a blast furnace, for the purpose of separating and catching any fine ust passing through said llue and it consists in the construction and arrangement of parts as hereinafter described and pointed out in the annexed claims.

Referring to-the accompanying drawings 1 denotes a cylindrical shell inclosing a dust chamber 2 and havinga bottom 3,preferably hopper shaped, and provided with an outlet opening 4 closed by a valve 5, pivoted to a lever handle 6, connected by a link 7 with a bracket 8 on the shell '1. Near the bottom of the dust chamber 2 and just above the hopper shaped bottom 3 is an inlet pipe 9 by which the dust chamber 2 is connected with the blast furnace or other coal consumer, and-at the upper end ofthe dust Chamber is an outlet pipe 10, preferably connected with a vertical stack. The inlet pipe 9 is arranged tangential to the dust catching chamber, so that an incoming'curf rent carrying dust through the inlet pipe 9v is carried in acircular path around the chamber 2 forming a rapid vortex, and causing the particles of dust to be carried by centrifugal force against the interior surface of the inclosinfr shell 1. Arranged at the upper end of the chamber 2 is an annular ipe 11 provided with a series of short outet pipes 12 arranged at an oblique angle to the wall of the chamber, and which are gradually contracted in area to form reof the shell 1. The annular pipe 11 is conpressure, and theflow of water through lthe Apipe 14 is controlled v by a valve15, the stem of-'whch is provided ,with a radial arm'16 having its freeend connected by a link 17 with the free end o f a lever' 18 pivoted'at'the opposite end to a bracket 19 on a diaphra m' case'20,containinga diaphragm 21 on whlch Vis supported a follower 22 having a stem'23 pivoted'at itsupper end to the lever 18'.

The space below' thediaphragm 21 communicates by a pipe 24 with the chamber 2,

so. that any pressure within the chamber 2 f Patented-aug'. 23,1916; 1

Stricted nozzles 13 contiguous' to theirwall i will be appliedfto the ,under side of the dial I phragm 21 to liftthe .-lever.18,fand by ,means of the link connection 17 rock -thev watervalve 15 to o en the sameand allow water to be suppli to the annular 'pipe 11. vThe pressure a ainst ythe diaphragm 21 is coun-A terbalance by a spring 25 connecting the free end of .the lever 18 with a fixed point.

Thelower end offthe shell 1 is providedwith an overflow pipe 26 which is ,turned upwardly at its outer end at 27 to determine the level of the water line formed'by the'accumulation of water in the bottom of the chamber 2,and also to bring the water line above the point of connection between the4 A chamber 2 and the overflow pipe 26, so that the vertical column of water 1n the upturned end 27 of the overflow pipe 26 will serve as a water seal to resist the pressure within the chamber 2.

The operation of my apparatus is as follows The current of air or gas with contained dust enters the dust chamber 2 through the restricted inlet 9 tangentially to the chamber and passing in a circular current around the chamber finds its main exit. through' the outlet pipe 10. Water is admitted through the pipe 14 to the annular pipe 11 and is`delivered through the nozzles 13 against the inner side vof the shell 1 and preferably at an oblique'angle thereto, by which the wall vof the chamber 2 is kept wet and the continued supply of water running down the wall of the chamber serves to Wash off the accumulation of dust and carry it 'into the hopper .shaped bottom 3, from which it may be withdrawn through the opening 4. A body of Water is maintained flow Ev within the chamber2 by means-sofia'dia-l upon the water in the freefendorf 1the over# the pipe 14 -isregulated by. t11e pres'sure phragm 21, so thatfanyffincreased flowpof the products of combustion afi-om the, :furnace to the chamber-.2 will tend to openthe water .valve 15 and increase the iowof ,water through the'nozzles 13, therebymaking the water supply correspond toan Aincreased or ldecreased lowmofv gases ,through :the Ichamber 2. The employment-of Ia`-vortex chamber such as lchamber 2, for the purpose of catching accumulations 4of dust is not new, and a similar device is already employed in wood working establishments, but the application of a `liquid for the purpose of moistening the accumulation of dust carried by centrifugal force against the wall of the chamber, and applying the liquid so as to Wash the .inner-Wall of the shell 1, -I believe to be broadly new, and I therefore *do not wish to confine myselItl to the specic 4details of construction as hereindescribed for the purpose of accomplishing this result.

What I claim as my invention and desire to secure by Letters Patent is 1. In a dust catcher, the combination with a single chamber having a vertical wall and a funnel shaped bottom, of a valve closing the lower end of said bottom, a tangential opening for the admission of a dust laden current immediately above said bot-tom, an opening at the top of said chamber for the exit of said current, and an annular pipe at the top of saidchamber connected with a source of water supply and provided with a series of outlet pipes extending toward thewall of said chamber, and gradually contracted in area to lform restricted nozzles contiguous to the wall of said chamber.

pipe. The supply of water through- 2 Industcatcher tliwembinatw .with taiwan, of an uilet plpeV tangential :,to'ffsaid jchamber arranged to admit a dust-ladn'current undei" pressure near'thebottom of said chamber,uarestricted opening atthe top of said i chamber-"for the exit of said current,'"`wher'e lb'y'a certain @amount of pressure is maintained in said chamber, means for washing said vertical wallV byaa descending'v flow .of

`water,-and means for controlling the amount ofv said -lowby thet amount 4of pressure in said chamber. l f

3. 'In adustcatchenthe combination with a cylindrical chamber having a vertical wall anda funnel shaped bottom, of a valve for closing the lowerend of said Vfunnel shaped bottom,l anI inlet, pipe tangfential to. said chamberrforthe admission of--a dust laden currentfnear-'the bottom of said chamber,

an opening in the top .ofAv said chamber for the exityof said current, and anannular pipe at the topvof said chamber -provided with a series of outlet pipes extending from said annular pipe toward the wall of said chamberand arranged at an oblique angle to said Wall.

4. In -afdust catcher, the combination with a cylindrical chamber having vertical walls and a funnelshaped bottom, of a valve closing the lowerl end of said bottom, a tangential opening for the admission of a dust laden current immediately above said bottom, an opening at the top of said chamber for the exit of said current, means for supplying one or more jets of water against the inner side of the wall of said chamber near the top, means for regulating the supply of water to correspond with the change of pressure in said chamber, and an overflow pipe for said funnel shaped bottom, said overflow pipe being provided with a Water seal.

Dated this fifth day of April 1904.

VICTOR E. EDWARDS. Witnesses:

PENELOPE CCMBERBACH, RUFUS B. FowLER. 

